Hey there,
The word problem is as follows:
In numbers this would mean t x 52 = 349. Now to solve for t we would do the opposite of multiplication which is is division.
So...
The answer would be t is equal to 6 and or 6.712
Hope I helped,
Amna
Answer:
So the best answer for this case would be:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the costs of unleaded gasoline of a population, and for this case we know the distribution for X is given by:
Where and
We select a sample size of n =16. Since the distribution for X is normal then we know that the distribution for the sample mean is given by:
So the best answer for this case would be: